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32#include <linux/module.h>
33#include <linux/list.h>
34#include <linux/slab.h>
35#include <linux/workqueue.h>
36#include <linux/skbuff.h>
37#include <linux/timer.h>
38#include <linux/notifier.h>
39#include <linux/inetdevice.h>
40
41#include <net/neighbour.h>
42#include <net/netevent.h>
43#include <net/route.h>
44
45#include "tcb.h"
46#include "cxgb3_offload.h"
47#include "iwch.h"
48#include "iwch_provider.h"
49#include "iwch_cm.h"
50
51static char *states[] = {
52 "idle",
53 "listen",
54 "connecting",
55 "mpa_wait_req",
56 "mpa_req_sent",
57 "mpa_req_rcvd",
58 "mpa_rep_sent",
59 "fpdu_mode",
60 "aborting",
61 "closing",
62 "moribund",
63 "dead",
64 NULL,
65};
66
67int peer2peer = 0;
68module_param(peer2peer, int, 0644);
69MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)");
70
71static int ep_timeout_secs = 60;
72module_param(ep_timeout_secs, int, 0644);
73MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
74 "in seconds (default=60)");
75
76static int mpa_rev = 1;
77module_param(mpa_rev, int, 0644);
78MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
79 "1 is spec compliant. (default=1)");
80
81static int markers_enabled = 0;
82module_param(markers_enabled, int, 0644);
83MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
84
85static int crc_enabled = 1;
86module_param(crc_enabled, int, 0644);
87MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
88
89static int rcv_win = 256 * 1024;
90module_param(rcv_win, int, 0644);
91MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256)");
92
93static int snd_win = 32 * 1024;
94module_param(snd_win, int, 0644);
95MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=32KB)");
96
97static unsigned int nocong = 0;
98module_param(nocong, uint, 0644);
99MODULE_PARM_DESC(nocong, "Turn off congestion control (default=0)");
100
101static unsigned int cong_flavor = 1;
102module_param(cong_flavor, uint, 0644);
103MODULE_PARM_DESC(cong_flavor, "TCP Congestion control flavor (default=1)");
104
105static struct workqueue_struct *workq;
106
107static struct sk_buff_head rxq;
108
109static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
110static void ep_timeout(struct timer_list *t);
111static void connect_reply_upcall(struct iwch_ep *ep, int status);
112
113static void start_ep_timer(struct iwch_ep *ep)
114{
115 pr_debug("%s ep %p\n", __func__, ep);
116 if (timer_pending(&ep->timer)) {
117 pr_debug("%s stopped / restarted timer ep %p\n", __func__, ep);
118 del_timer_sync(&ep->timer);
119 } else
120 get_ep(&ep->com);
121 ep->timer.expires = jiffies + ep_timeout_secs * HZ;
122 add_timer(&ep->timer);
123}
124
125static void stop_ep_timer(struct iwch_ep *ep)
126{
127 pr_debug("%s ep %p\n", __func__, ep);
128 if (!timer_pending(&ep->timer)) {
129 WARN(1, "%s timer stopped when its not running! ep %p state %u\n",
130 __func__, ep, ep->com.state);
131 return;
132 }
133 del_timer_sync(&ep->timer);
134 put_ep(&ep->com);
135}
136
137static int iwch_l2t_send(struct t3cdev *tdev, struct sk_buff *skb, struct l2t_entry *l2e)
138{
139 int error = 0;
140 struct cxio_rdev *rdev;
141
142 rdev = (struct cxio_rdev *)tdev->ulp;
143 if (cxio_fatal_error(rdev)) {
144 kfree_skb(skb);
145 return -EIO;
146 }
147 error = l2t_send(tdev, skb, l2e);
148 if (error < 0)
149 kfree_skb(skb);
150 return error < 0 ? error : 0;
151}
152
153int iwch_cxgb3_ofld_send(struct t3cdev *tdev, struct sk_buff *skb)
154{
155 int error = 0;
156 struct cxio_rdev *rdev;
157
158 rdev = (struct cxio_rdev *)tdev->ulp;
159 if (cxio_fatal_error(rdev)) {
160 kfree_skb(skb);
161 return -EIO;
162 }
163 error = cxgb3_ofld_send(tdev, skb);
164 if (error < 0)
165 kfree_skb(skb);
166 return error < 0 ? error : 0;
167}
168
169static void release_tid(struct t3cdev *tdev, u32 hwtid, struct sk_buff *skb)
170{
171 struct cpl_tid_release *req;
172
173 skb = get_skb(skb, sizeof *req, GFP_KERNEL);
174 if (!skb)
175 return;
176 req = skb_put(skb, sizeof(*req));
177 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
178 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
179 skb->priority = CPL_PRIORITY_SETUP;
180 iwch_cxgb3_ofld_send(tdev, skb);
181 return;
182}
183
184int iwch_quiesce_tid(struct iwch_ep *ep)
185{
186 struct cpl_set_tcb_field *req;
187 struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
188
189 if (!skb)
190 return -ENOMEM;
191 req = skb_put(skb, sizeof(*req));
192 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
193 req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
194 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid));
195 req->reply = 0;
196 req->cpu_idx = 0;
197 req->word = htons(W_TCB_RX_QUIESCE);
198 req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE);
199 req->val = cpu_to_be64(1 << S_TCB_RX_QUIESCE);
200
201 skb->priority = CPL_PRIORITY_DATA;
202 return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
203}
204
205int iwch_resume_tid(struct iwch_ep *ep)
206{
207 struct cpl_set_tcb_field *req;
208 struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
209
210 if (!skb)
211 return -ENOMEM;
212 req = skb_put(skb, sizeof(*req));
213 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
214 req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
215 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid));
216 req->reply = 0;
217 req->cpu_idx = 0;
218 req->word = htons(W_TCB_RX_QUIESCE);
219 req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE);
220 req->val = 0;
221
222 skb->priority = CPL_PRIORITY_DATA;
223 return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
224}
225
226static void set_emss(struct iwch_ep *ep, u16 opt)
227{
228 pr_debug("%s ep %p opt %u\n", __func__, ep, opt);
229 ep->emss = T3C_DATA(ep->com.tdev)->mtus[G_TCPOPT_MSS(opt)] - 40;
230 if (G_TCPOPT_TSTAMP(opt))
231 ep->emss -= 12;
232 if (ep->emss < 128)
233 ep->emss = 128;
234 pr_debug("emss=%d\n", ep->emss);
235}
236
237static enum iwch_ep_state state_read(struct iwch_ep_common *epc)
238{
239 unsigned long flags;
240 enum iwch_ep_state state;
241
242 spin_lock_irqsave(&epc->lock, flags);
243 state = epc->state;
244 spin_unlock_irqrestore(&epc->lock, flags);
245 return state;
246}
247
248static void __state_set(struct iwch_ep_common *epc, enum iwch_ep_state new)
249{
250 epc->state = new;
251}
252
253static void state_set(struct iwch_ep_common *epc, enum iwch_ep_state new)
254{
255 unsigned long flags;
256
257 spin_lock_irqsave(&epc->lock, flags);
258 pr_debug("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
259 __state_set(epc, new);
260 spin_unlock_irqrestore(&epc->lock, flags);
261 return;
262}
263
264static void *alloc_ep(int size, gfp_t gfp)
265{
266 struct iwch_ep_common *epc;
267
268 epc = kzalloc(size, gfp);
269 if (epc) {
270 kref_init(&epc->kref);
271 spin_lock_init(&epc->lock);
272 init_waitqueue_head(&epc->waitq);
273 }
274 pr_debug("%s alloc ep %p\n", __func__, epc);
275 return epc;
276}
277
278void __free_ep(struct kref *kref)
279{
280 struct iwch_ep *ep;
281 ep = container_of(container_of(kref, struct iwch_ep_common, kref),
282 struct iwch_ep, com);
283 pr_debug("%s ep %p state %s\n",
284 __func__, ep, states[state_read(&ep->com)]);
285 if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
286 cxgb3_remove_tid(ep->com.tdev, (void *)ep, ep->hwtid);
287 dst_release(ep->dst);
288 l2t_release(ep->com.tdev, ep->l2t);
289 }
290 kfree(ep);
291}
292
293static void release_ep_resources(struct iwch_ep *ep)
294{
295 pr_debug("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
296 set_bit(RELEASE_RESOURCES, &ep->com.flags);
297 put_ep(&ep->com);
298}
299
300static int status2errno(int status)
301{
302 switch (status) {
303 case CPL_ERR_NONE:
304 return 0;
305 case CPL_ERR_CONN_RESET:
306 return -ECONNRESET;
307 case CPL_ERR_ARP_MISS:
308 return -EHOSTUNREACH;
309 case CPL_ERR_CONN_TIMEDOUT:
310 return -ETIMEDOUT;
311 case CPL_ERR_TCAM_FULL:
312 return -ENOMEM;
313 case CPL_ERR_CONN_EXIST:
314 return -EADDRINUSE;
315 default:
316 return -EIO;
317 }
318}
319
320
321
322
323static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
324{
325 if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
326 skb_trim(skb, 0);
327 skb_get(skb);
328 } else {
329 skb = alloc_skb(len, gfp);
330 }
331 return skb;
332}
333
334static struct rtable *find_route(struct t3cdev *dev, __be32 local_ip,
335 __be32 peer_ip, __be16 local_port,
336 __be16 peer_port, u8 tos)
337{
338 struct rtable *rt;
339 struct flowi4 fl4;
340
341 rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
342 peer_port, local_port, IPPROTO_TCP,
343 tos, 0);
344 if (IS_ERR(rt))
345 return NULL;
346 return rt;
347}
348
349static unsigned int find_best_mtu(const struct t3c_data *d, unsigned short mtu)
350{
351 int i = 0;
352
353 while (i < d->nmtus - 1 && d->mtus[i + 1] <= mtu)
354 ++i;
355 return i;
356}
357
358static void arp_failure_discard(struct t3cdev *dev, struct sk_buff *skb)
359{
360 pr_debug("%s t3cdev %p\n", __func__, dev);
361 kfree_skb(skb);
362}
363
364
365
366
367static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb)
368{
369 pr_err("ARP failure during connect\n");
370 kfree_skb(skb);
371}
372
373
374
375
376
377static void abort_arp_failure(struct t3cdev *dev, struct sk_buff *skb)
378{
379 struct cpl_abort_req *req = cplhdr(skb);
380
381 pr_debug("%s t3cdev %p\n", __func__, dev);
382 req->cmd = CPL_ABORT_NO_RST;
383 iwch_cxgb3_ofld_send(dev, skb);
384}
385
386static int send_halfclose(struct iwch_ep *ep, gfp_t gfp)
387{
388 struct cpl_close_con_req *req;
389 struct sk_buff *skb;
390
391 pr_debug("%s ep %p\n", __func__, ep);
392 skb = get_skb(NULL, sizeof(*req), gfp);
393 if (!skb) {
394 pr_err("%s - failed to alloc skb\n", __func__);
395 return -ENOMEM;
396 }
397 skb->priority = CPL_PRIORITY_DATA;
398 set_arp_failure_handler(skb, arp_failure_discard);
399 req = skb_put(skb, sizeof(*req));
400 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON));
401 req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
402 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, ep->hwtid));
403 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
404}
405
406static int send_abort(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp)
407{
408 struct cpl_abort_req *req;
409
410 pr_debug("%s ep %p\n", __func__, ep);
411 skb = get_skb(skb, sizeof(*req), gfp);
412 if (!skb) {
413 pr_err("%s - failed to alloc skb\n", __func__);
414 return -ENOMEM;
415 }
416 skb->priority = CPL_PRIORITY_DATA;
417 set_arp_failure_handler(skb, abort_arp_failure);
418 req = skb_put_zero(skb, sizeof(*req));
419 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ));
420 req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
421 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
422 req->cmd = CPL_ABORT_SEND_RST;
423 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
424}
425
426static int send_connect(struct iwch_ep *ep)
427{
428 struct cpl_act_open_req *req;
429 struct sk_buff *skb;
430 u32 opt0h, opt0l, opt2;
431 unsigned int mtu_idx;
432 int wscale;
433
434 pr_debug("%s ep %p\n", __func__, ep);
435
436 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
437 if (!skb) {
438 pr_err("%s - failed to alloc skb\n", __func__);
439 return -ENOMEM;
440 }
441 mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst));
442 wscale = compute_wscale(rcv_win);
443 opt0h = V_NAGLE(0) |
444 V_NO_CONG(nocong) |
445 V_KEEP_ALIVE(1) |
446 F_TCAM_BYPASS |
447 V_WND_SCALE(wscale) |
448 V_MSS_IDX(mtu_idx) |
449 V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx);
450 opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10);
451 opt2 = F_RX_COALESCE_VALID | V_RX_COALESCE(0) | V_FLAVORS_VALID(1) |
452 V_CONG_CONTROL_FLAVOR(cong_flavor);
453 skb->priority = CPL_PRIORITY_SETUP;
454 set_arp_failure_handler(skb, act_open_req_arp_failure);
455
456 req = skb_put(skb, sizeof(*req));
457 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
458 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ep->atid));
459 req->local_port = ep->com.local_addr.sin_port;
460 req->peer_port = ep->com.remote_addr.sin_port;
461 req->local_ip = ep->com.local_addr.sin_addr.s_addr;
462 req->peer_ip = ep->com.remote_addr.sin_addr.s_addr;
463 req->opt0h = htonl(opt0h);
464 req->opt0l = htonl(opt0l);
465 req->params = 0;
466 req->opt2 = htonl(opt2);
467 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
468}
469
470static void send_mpa_req(struct iwch_ep *ep, struct sk_buff *skb)
471{
472 int mpalen;
473 struct tx_data_wr *req;
474 struct mpa_message *mpa;
475 int len;
476
477 pr_debug("%s ep %p pd_len %d\n", __func__, ep, ep->plen);
478
479 BUG_ON(skb_cloned(skb));
480
481 mpalen = sizeof(*mpa) + ep->plen;
482 if (skb->data + mpalen + sizeof(*req) > skb_end_pointer(skb)) {
483 kfree_skb(skb);
484 skb=alloc_skb(mpalen + sizeof(*req), GFP_KERNEL);
485 if (!skb) {
486 connect_reply_upcall(ep, -ENOMEM);
487 return;
488 }
489 }
490 skb_trim(skb, 0);
491 skb_reserve(skb, sizeof(*req));
492 skb_put(skb, mpalen);
493 skb->priority = CPL_PRIORITY_DATA;
494 mpa = (struct mpa_message *) skb->data;
495 memset(mpa, 0, sizeof(*mpa));
496 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
497 mpa->flags = (crc_enabled ? MPA_CRC : 0) |
498 (markers_enabled ? MPA_MARKERS : 0);
499 mpa->private_data_size = htons(ep->plen);
500 mpa->revision = mpa_rev;
501
502 if (ep->plen)
503 memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen);
504
505
506
507
508
509
510 skb_get(skb);
511 set_arp_failure_handler(skb, arp_failure_discard);
512 skb_reset_transport_header(skb);
513 len = skb->len;
514 req = skb_push(skb, sizeof(*req));
515 req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
516 req->wr_lo = htonl(V_WR_TID(ep->hwtid));
517 req->len = htonl(len);
518 req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
519 V_TX_SNDBUF(snd_win>>15));
520 req->flags = htonl(F_TX_INIT);
521 req->sndseq = htonl(ep->snd_seq);
522 BUG_ON(ep->mpa_skb);
523 ep->mpa_skb = skb;
524 iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
525 start_ep_timer(ep);
526 state_set(&ep->com, MPA_REQ_SENT);
527 return;
528}
529
530static int send_mpa_reject(struct iwch_ep *ep, const void *pdata, u8 plen)
531{
532 int mpalen;
533 struct tx_data_wr *req;
534 struct mpa_message *mpa;
535 struct sk_buff *skb;
536
537 pr_debug("%s ep %p plen %d\n", __func__, ep, plen);
538
539 mpalen = sizeof(*mpa) + plen;
540
541 skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL);
542 if (!skb) {
543 pr_err("%s - cannot alloc skb!\n", __func__);
544 return -ENOMEM;
545 }
546 skb_reserve(skb, sizeof(*req));
547 mpa = skb_put(skb, mpalen);
548 memset(mpa, 0, sizeof(*mpa));
549 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
550 mpa->flags = MPA_REJECT;
551 mpa->revision = mpa_rev;
552 mpa->private_data_size = htons(plen);
553 if (plen)
554 memcpy(mpa->private_data, pdata, plen);
555
556
557
558
559
560
561 skb_get(skb);
562 skb->priority = CPL_PRIORITY_DATA;
563 set_arp_failure_handler(skb, arp_failure_discard);
564 skb_reset_transport_header(skb);
565 req = skb_push(skb, sizeof(*req));
566 req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
567 req->wr_lo = htonl(V_WR_TID(ep->hwtid));
568 req->len = htonl(mpalen);
569 req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
570 V_TX_SNDBUF(snd_win>>15));
571 req->flags = htonl(F_TX_INIT);
572 req->sndseq = htonl(ep->snd_seq);
573 BUG_ON(ep->mpa_skb);
574 ep->mpa_skb = skb;
575 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
576}
577
578static int send_mpa_reply(struct iwch_ep *ep, const void *pdata, u8 plen)
579{
580 int mpalen;
581 struct tx_data_wr *req;
582 struct mpa_message *mpa;
583 int len;
584 struct sk_buff *skb;
585
586 pr_debug("%s ep %p plen %d\n", __func__, ep, plen);
587
588 mpalen = sizeof(*mpa) + plen;
589
590 skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL);
591 if (!skb) {
592 pr_err("%s - cannot alloc skb!\n", __func__);
593 return -ENOMEM;
594 }
595 skb->priority = CPL_PRIORITY_DATA;
596 skb_reserve(skb, sizeof(*req));
597 mpa = skb_put(skb, mpalen);
598 memset(mpa, 0, sizeof(*mpa));
599 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
600 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
601 (markers_enabled ? MPA_MARKERS : 0);
602 mpa->revision = mpa_rev;
603 mpa->private_data_size = htons(plen);
604 if (plen)
605 memcpy(mpa->private_data, pdata, plen);
606
607
608
609
610
611
612 skb_get(skb);
613 set_arp_failure_handler(skb, arp_failure_discard);
614 skb_reset_transport_header(skb);
615 len = skb->len;
616 req = skb_push(skb, sizeof(*req));
617 req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL);
618 req->wr_lo = htonl(V_WR_TID(ep->hwtid));
619 req->len = htonl(len);
620 req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) |
621 V_TX_SNDBUF(snd_win>>15));
622 req->flags = htonl(F_TX_INIT);
623 req->sndseq = htonl(ep->snd_seq);
624 ep->mpa_skb = skb;
625 state_set(&ep->com, MPA_REP_SENT);
626 return iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
627}
628
629static int act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
630{
631 struct iwch_ep *ep = ctx;
632 struct cpl_act_establish *req = cplhdr(skb);
633 unsigned int tid = GET_TID(req);
634
635 pr_debug("%s ep %p tid %d\n", __func__, ep, tid);
636
637 dst_confirm(ep->dst);
638
639
640 ep->hwtid = tid;
641 cxgb3_insert_tid(ep->com.tdev, &t3c_client, ep, tid);
642
643 ep->snd_seq = ntohl(req->snd_isn);
644 ep->rcv_seq = ntohl(req->rcv_isn);
645
646 set_emss(ep, ntohs(req->tcp_opt));
647
648
649 cxgb3_free_atid(ep->com.tdev, ep->atid);
650
651
652 send_mpa_req(ep, skb);
653
654 return 0;
655}
656
657static void abort_connection(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp)
658{
659 pr_debug("%s ep %p\n", __FILE__, ep);
660 state_set(&ep->com, ABORTING);
661 send_abort(ep, skb, gfp);
662}
663
664static void close_complete_upcall(struct iwch_ep *ep)
665{
666 struct iw_cm_event event;
667
668 pr_debug("%s ep %p\n", __func__, ep);
669 memset(&event, 0, sizeof(event));
670 event.event = IW_CM_EVENT_CLOSE;
671 if (ep->com.cm_id) {
672 pr_debug("close complete delivered ep %p cm_id %p tid %d\n",
673 ep, ep->com.cm_id, ep->hwtid);
674 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
675 ep->com.cm_id->rem_ref(ep->com.cm_id);
676 ep->com.cm_id = NULL;
677 ep->com.qp = NULL;
678 }
679}
680
681static void peer_close_upcall(struct iwch_ep *ep)
682{
683 struct iw_cm_event event;
684
685 pr_debug("%s ep %p\n", __func__, ep);
686 memset(&event, 0, sizeof(event));
687 event.event = IW_CM_EVENT_DISCONNECT;
688 if (ep->com.cm_id) {
689 pr_debug("peer close delivered ep %p cm_id %p tid %d\n",
690 ep, ep->com.cm_id, ep->hwtid);
691 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
692 }
693}
694
695static void peer_abort_upcall(struct iwch_ep *ep)
696{
697 struct iw_cm_event event;
698
699 pr_debug("%s ep %p\n", __func__, ep);
700 memset(&event, 0, sizeof(event));
701 event.event = IW_CM_EVENT_CLOSE;
702 event.status = -ECONNRESET;
703 if (ep->com.cm_id) {
704 pr_debug("abort delivered ep %p cm_id %p tid %d\n", ep,
705 ep->com.cm_id, ep->hwtid);
706 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
707 ep->com.cm_id->rem_ref(ep->com.cm_id);
708 ep->com.cm_id = NULL;
709 ep->com.qp = NULL;
710 }
711}
712
713static void connect_reply_upcall(struct iwch_ep *ep, int status)
714{
715 struct iw_cm_event event;
716
717 pr_debug("%s ep %p status %d\n", __func__, ep, status);
718 memset(&event, 0, sizeof(event));
719 event.event = IW_CM_EVENT_CONNECT_REPLY;
720 event.status = status;
721 memcpy(&event.local_addr, &ep->com.local_addr,
722 sizeof(ep->com.local_addr));
723 memcpy(&event.remote_addr, &ep->com.remote_addr,
724 sizeof(ep->com.remote_addr));
725
726 if ((status == 0) || (status == -ECONNREFUSED)) {
727 event.private_data_len = ep->plen;
728 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
729 }
730 if (ep->com.cm_id) {
731 pr_debug("%s ep %p tid %d status %d\n", __func__, ep,
732 ep->hwtid, status);
733 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
734 }
735 if (status < 0) {
736 ep->com.cm_id->rem_ref(ep->com.cm_id);
737 ep->com.cm_id = NULL;
738 ep->com.qp = NULL;
739 }
740}
741
742static void connect_request_upcall(struct iwch_ep *ep)
743{
744 struct iw_cm_event event;
745
746 pr_debug("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
747 memset(&event, 0, sizeof(event));
748 event.event = IW_CM_EVENT_CONNECT_REQUEST;
749 memcpy(&event.local_addr, &ep->com.local_addr,
750 sizeof(ep->com.local_addr));
751 memcpy(&event.remote_addr, &ep->com.remote_addr,
752 sizeof(ep->com.local_addr));
753 event.private_data_len = ep->plen;
754 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
755 event.provider_data = ep;
756
757
758
759
760 event.ird = event.ord = 8;
761 if (state_read(&ep->parent_ep->com) != DEAD) {
762 get_ep(&ep->com);
763 ep->parent_ep->com.cm_id->event_handler(
764 ep->parent_ep->com.cm_id,
765 &event);
766 }
767 put_ep(&ep->parent_ep->com);
768 ep->parent_ep = NULL;
769}
770
771static void established_upcall(struct iwch_ep *ep)
772{
773 struct iw_cm_event event;
774
775 pr_debug("%s ep %p\n", __func__, ep);
776 memset(&event, 0, sizeof(event));
777 event.event = IW_CM_EVENT_ESTABLISHED;
778
779
780
781
782 event.ird = event.ord = 8;
783 if (ep->com.cm_id) {
784 pr_debug("%s ep %p tid %d\n", __func__, ep, ep->hwtid);
785 ep->com.cm_id->event_handler(ep->com.cm_id, &event);
786 }
787}
788
789static int update_rx_credits(struct iwch_ep *ep, u32 credits)
790{
791 struct cpl_rx_data_ack *req;
792 struct sk_buff *skb;
793
794 pr_debug("%s ep %p credits %u\n", __func__, ep, credits);
795 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
796 if (!skb) {
797 pr_err("update_rx_credits - cannot alloc skb!\n");
798 return 0;
799 }
800
801 req = skb_put(skb, sizeof(*req));
802 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
803 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, ep->hwtid));
804 req->credit_dack = htonl(V_RX_CREDITS(credits) | V_RX_FORCE_ACK(1));
805 skb->priority = CPL_PRIORITY_ACK;
806 iwch_cxgb3_ofld_send(ep->com.tdev, skb);
807 return credits;
808}
809
810static void process_mpa_reply(struct iwch_ep *ep, struct sk_buff *skb)
811{
812 struct mpa_message *mpa;
813 u16 plen;
814 struct iwch_qp_attributes attrs;
815 enum iwch_qp_attr_mask mask;
816 int err;
817
818 pr_debug("%s ep %p\n", __func__, ep);
819
820
821
822
823
824
825 stop_ep_timer(ep);
826 if (state_read(&ep->com) != MPA_REQ_SENT)
827 return;
828
829
830
831
832
833 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
834 err = -EINVAL;
835 goto err;
836 }
837
838
839
840
841 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
842 skb->len);
843 ep->mpa_pkt_len += skb->len;
844
845
846
847
848 if (ep->mpa_pkt_len < sizeof(*mpa))
849 return;
850 mpa = (struct mpa_message *) ep->mpa_pkt;
851
852
853 if (mpa->revision != mpa_rev) {
854 err = -EPROTO;
855 goto err;
856 }
857 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
858 err = -EPROTO;
859 goto err;
860 }
861
862 plen = ntohs(mpa->private_data_size);
863
864
865
866
867 if (plen > MPA_MAX_PRIVATE_DATA) {
868 err = -EPROTO;
869 goto err;
870 }
871
872
873
874
875 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
876 err = -EPROTO;
877 goto err;
878 }
879
880 ep->plen = (u8) plen;
881
882
883
884
885
886 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
887 return;
888
889 if (mpa->flags & MPA_REJECT) {
890 err = -ECONNREFUSED;
891 goto err;
892 }
893
894
895
896
897
898
899 state_set(&ep->com, FPDU_MODE);
900 ep->mpa_attr.initiator = 1;
901 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
902 ep->mpa_attr.recv_marker_enabled = markers_enabled;
903 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
904 ep->mpa_attr.version = mpa_rev;
905 pr_debug("%s - crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d\n",
906 __func__,
907 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
908 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
909
910 attrs.mpa_attr = ep->mpa_attr;
911 attrs.max_ird = ep->ird;
912 attrs.max_ord = ep->ord;
913 attrs.llp_stream_handle = ep;
914 attrs.next_state = IWCH_QP_STATE_RTS;
915
916 mask = IWCH_QP_ATTR_NEXT_STATE |
917 IWCH_QP_ATTR_LLP_STREAM_HANDLE | IWCH_QP_ATTR_MPA_ATTR |
918 IWCH_QP_ATTR_MAX_IRD | IWCH_QP_ATTR_MAX_ORD;
919
920
921 err = iwch_modify_qp(ep->com.qp->rhp,
922 ep->com.qp, mask, &attrs, 1);
923 if (err)
924 goto err;
925
926 if (peer2peer && iwch_rqes_posted(ep->com.qp) == 0) {
927 iwch_post_zb_read(ep);
928 }
929
930 goto out;
931err:
932 abort_connection(ep, skb, GFP_KERNEL);
933out:
934 connect_reply_upcall(ep, err);
935 return;
936}
937
938static void process_mpa_request(struct iwch_ep *ep, struct sk_buff *skb)
939{
940 struct mpa_message *mpa;
941 u16 plen;
942
943 pr_debug("%s ep %p\n", __func__, ep);
944
945
946
947
948
949
950 stop_ep_timer(ep);
951 if (state_read(&ep->com) != MPA_REQ_WAIT)
952 return;
953
954
955
956
957
958 if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
959 abort_connection(ep, skb, GFP_KERNEL);
960 return;
961 }
962
963 pr_debug("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
964
965
966
967
968 skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
969 skb->len);
970 ep->mpa_pkt_len += skb->len;
971
972
973
974
975
976 if (ep->mpa_pkt_len < sizeof(*mpa))
977 return;
978 pr_debug("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
979 mpa = (struct mpa_message *) ep->mpa_pkt;
980
981
982
983
984 if (mpa->revision != mpa_rev) {
985 abort_connection(ep, skb, GFP_KERNEL);
986 return;
987 }
988
989 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
990 abort_connection(ep, skb, GFP_KERNEL);
991 return;
992 }
993
994 plen = ntohs(mpa->private_data_size);
995
996
997
998
999 if (plen > MPA_MAX_PRIVATE_DATA) {
1000 abort_connection(ep, skb, GFP_KERNEL);
1001 return;
1002 }
1003
1004
1005
1006
1007 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
1008 abort_connection(ep, skb, GFP_KERNEL);
1009 return;
1010 }
1011 ep->plen = (u8) plen;
1012
1013
1014
1015
1016 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
1017 return;
1018
1019
1020
1021
1022
1023 ep->mpa_attr.initiator = 0;
1024 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
1025 ep->mpa_attr.recv_marker_enabled = markers_enabled;
1026 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
1027 ep->mpa_attr.version = mpa_rev;
1028 pr_debug("%s - crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d\n",
1029 __func__,
1030 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
1031 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version);
1032
1033 state_set(&ep->com, MPA_REQ_RCVD);
1034
1035
1036 connect_request_upcall(ep);
1037 return;
1038}
1039
1040static int rx_data(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1041{
1042 struct iwch_ep *ep = ctx;
1043 struct cpl_rx_data *hdr = cplhdr(skb);
1044 unsigned int dlen = ntohs(hdr->len);
1045
1046 pr_debug("%s ep %p dlen %u\n", __func__, ep, dlen);
1047
1048 skb_pull(skb, sizeof(*hdr));
1049 skb_trim(skb, dlen);
1050
1051 ep->rcv_seq += dlen;
1052 BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen));
1053
1054 switch (state_read(&ep->com)) {
1055 case MPA_REQ_SENT:
1056 process_mpa_reply(ep, skb);
1057 break;
1058 case MPA_REQ_WAIT:
1059 process_mpa_request(ep, skb);
1060 break;
1061 case MPA_REP_SENT:
1062 break;
1063 default:
1064 pr_err("%s Unexpected streaming data. ep %p state %d tid %d\n",
1065 __func__, ep, state_read(&ep->com), ep->hwtid);
1066
1067
1068
1069
1070
1071 break;
1072 }
1073
1074
1075 update_rx_credits(ep, dlen);
1076
1077 return CPL_RET_BUF_DONE;
1078}
1079
1080
1081
1082
1083
1084
1085static int tx_ack(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1086{
1087 struct iwch_ep *ep = ctx;
1088 struct cpl_wr_ack *hdr = cplhdr(skb);
1089 unsigned int credits = ntohs(hdr->credits);
1090 unsigned long flags;
1091 int post_zb = 0;
1092
1093 pr_debug("%s ep %p credits %u\n", __func__, ep, credits);
1094
1095 if (credits == 0) {
1096 pr_debug("%s 0 credit ack ep %p state %u\n",
1097 __func__, ep, state_read(&ep->com));
1098 return CPL_RET_BUF_DONE;
1099 }
1100
1101 spin_lock_irqsave(&ep->com.lock, flags);
1102 BUG_ON(credits != 1);
1103 dst_confirm(ep->dst);
1104 if (!ep->mpa_skb) {
1105 pr_debug("%s rdma_init wr_ack ep %p state %u\n",
1106 __func__, ep, ep->com.state);
1107 if (ep->mpa_attr.initiator) {
1108 pr_debug("%s initiator ep %p state %u\n",
1109 __func__, ep, ep->com.state);
1110 if (peer2peer && ep->com.state == FPDU_MODE)
1111 post_zb = 1;
1112 } else {
1113 pr_debug("%s responder ep %p state %u\n",
1114 __func__, ep, ep->com.state);
1115 if (ep->com.state == MPA_REQ_RCVD) {
1116 ep->com.rpl_done = 1;
1117 wake_up(&ep->com.waitq);
1118 }
1119 }
1120 } else {
1121 pr_debug("%s lsm ack ep %p state %u freeing skb\n",
1122 __func__, ep, ep->com.state);
1123 kfree_skb(ep->mpa_skb);
1124 ep->mpa_skb = NULL;
1125 }
1126 spin_unlock_irqrestore(&ep->com.lock, flags);
1127 if (post_zb)
1128 iwch_post_zb_read(ep);
1129 return CPL_RET_BUF_DONE;
1130}
1131
1132static int abort_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1133{
1134 struct iwch_ep *ep = ctx;
1135 unsigned long flags;
1136 int release = 0;
1137
1138 pr_debug("%s ep %p\n", __func__, ep);
1139 BUG_ON(!ep);
1140
1141
1142
1143
1144
1145 if (!test_and_set_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags)) {
1146 return CPL_RET_BUF_DONE;
1147 }
1148
1149 spin_lock_irqsave(&ep->com.lock, flags);
1150 switch (ep->com.state) {
1151 case ABORTING:
1152 close_complete_upcall(ep);
1153 __state_set(&ep->com, DEAD);
1154 release = 1;
1155 break;
1156 default:
1157 pr_err("%s ep %p state %d\n", __func__, ep, ep->com.state);
1158 break;
1159 }
1160 spin_unlock_irqrestore(&ep->com.lock, flags);
1161
1162 if (release)
1163 release_ep_resources(ep);
1164 return CPL_RET_BUF_DONE;
1165}
1166
1167
1168
1169
1170static inline int act_open_has_tid(int status)
1171{
1172 return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
1173 status != CPL_ERR_ARP_MISS;
1174}
1175
1176static int act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1177{
1178 struct iwch_ep *ep = ctx;
1179 struct cpl_act_open_rpl *rpl = cplhdr(skb);
1180
1181 pr_debug("%s ep %p status %u errno %d\n", __func__, ep, rpl->status,
1182 status2errno(rpl->status));
1183 connect_reply_upcall(ep, status2errno(rpl->status));
1184 state_set(&ep->com, DEAD);
1185 if (ep->com.tdev->type != T3A && act_open_has_tid(rpl->status))
1186 release_tid(ep->com.tdev, GET_TID(rpl), NULL);
1187 cxgb3_free_atid(ep->com.tdev, ep->atid);
1188 dst_release(ep->dst);
1189 l2t_release(ep->com.tdev, ep->l2t);
1190 put_ep(&ep->com);
1191 return CPL_RET_BUF_DONE;
1192}
1193
1194static int listen_start(struct iwch_listen_ep *ep)
1195{
1196 struct sk_buff *skb;
1197 struct cpl_pass_open_req *req;
1198
1199 pr_debug("%s ep %p\n", __func__, ep);
1200 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1201 if (!skb) {
1202 pr_err("t3c_listen_start failed to alloc skb!\n");
1203 return -ENOMEM;
1204 }
1205
1206 req = skb_put(skb, sizeof(*req));
1207 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1208 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, ep->stid));
1209 req->local_port = ep->com.local_addr.sin_port;
1210 req->local_ip = ep->com.local_addr.sin_addr.s_addr;
1211 req->peer_port = 0;
1212 req->peer_ip = 0;
1213 req->peer_netmask = 0;
1214 req->opt0h = htonl(F_DELACK | F_TCAM_BYPASS);
1215 req->opt0l = htonl(V_RCV_BUFSIZ(rcv_win>>10));
1216 req->opt1 = htonl(V_CONN_POLICY(CPL_CONN_POLICY_ASK));
1217
1218 skb->priority = 1;
1219 return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
1220}
1221
1222static int pass_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1223{
1224 struct iwch_listen_ep *ep = ctx;
1225 struct cpl_pass_open_rpl *rpl = cplhdr(skb);
1226
1227 pr_debug("%s ep %p status %d error %d\n", __func__, ep,
1228 rpl->status, status2errno(rpl->status));
1229 ep->com.rpl_err = status2errno(rpl->status);
1230 ep->com.rpl_done = 1;
1231 wake_up(&ep->com.waitq);
1232
1233 return CPL_RET_BUF_DONE;
1234}
1235
1236static int listen_stop(struct iwch_listen_ep *ep)
1237{
1238 struct sk_buff *skb;
1239 struct cpl_close_listserv_req *req;
1240
1241 pr_debug("%s ep %p\n", __func__, ep);
1242 skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
1243 if (!skb) {
1244 pr_err("%s - failed to alloc skb\n", __func__);
1245 return -ENOMEM;
1246 }
1247 req = skb_put(skb, sizeof(*req));
1248 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1249 req->cpu_idx = 0;
1250 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, ep->stid));
1251 skb->priority = 1;
1252 return iwch_cxgb3_ofld_send(ep->com.tdev, skb);
1253}
1254
1255static int close_listsrv_rpl(struct t3cdev *tdev, struct sk_buff *skb,
1256 void *ctx)
1257{
1258 struct iwch_listen_ep *ep = ctx;
1259 struct cpl_close_listserv_rpl *rpl = cplhdr(skb);
1260
1261 pr_debug("%s ep %p\n", __func__, ep);
1262 ep->com.rpl_err = status2errno(rpl->status);
1263 ep->com.rpl_done = 1;
1264 wake_up(&ep->com.waitq);
1265 return CPL_RET_BUF_DONE;
1266}
1267
1268static void accept_cr(struct iwch_ep *ep, __be32 peer_ip, struct sk_buff *skb)
1269{
1270 struct cpl_pass_accept_rpl *rpl;
1271 unsigned int mtu_idx;
1272 u32 opt0h, opt0l, opt2;
1273 int wscale;
1274
1275 pr_debug("%s ep %p\n", __func__, ep);
1276 BUG_ON(skb_cloned(skb));
1277 skb_trim(skb, sizeof(*rpl));
1278 skb_get(skb);
1279 mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst));
1280 wscale = compute_wscale(rcv_win);
1281 opt0h = V_NAGLE(0) |
1282 V_NO_CONG(nocong) |
1283 V_KEEP_ALIVE(1) |
1284 F_TCAM_BYPASS |
1285 V_WND_SCALE(wscale) |
1286 V_MSS_IDX(mtu_idx) |
1287 V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx);
1288 opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10);
1289 opt2 = F_RX_COALESCE_VALID | V_RX_COALESCE(0) | V_FLAVORS_VALID(1) |
1290 V_CONG_CONTROL_FLAVOR(cong_flavor);
1291
1292 rpl = cplhdr(skb);
1293 rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1294 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, ep->hwtid));
1295 rpl->peer_ip = peer_ip;
1296 rpl->opt0h = htonl(opt0h);
1297 rpl->opt0l_status = htonl(opt0l | CPL_PASS_OPEN_ACCEPT);
1298 rpl->opt2 = htonl(opt2);
1299 rpl->rsvd = rpl->opt2;
1300 skb->priority = CPL_PRIORITY_SETUP;
1301 iwch_l2t_send(ep->com.tdev, skb, ep->l2t);
1302
1303 return;
1304}
1305
1306static void reject_cr(struct t3cdev *tdev, u32 hwtid, __be32 peer_ip,
1307 struct sk_buff *skb)
1308{
1309 pr_debug("%s t3cdev %p tid %u peer_ip %x\n", __func__, tdev, hwtid,
1310 peer_ip);
1311 BUG_ON(skb_cloned(skb));
1312 skb_trim(skb, sizeof(struct cpl_tid_release));
1313 skb_get(skb);
1314
1315 if (tdev->type != T3A)
1316 release_tid(tdev, hwtid, skb);
1317 else {
1318 struct cpl_pass_accept_rpl *rpl;
1319
1320 rpl = cplhdr(skb);
1321 skb->priority = CPL_PRIORITY_SETUP;
1322 rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1323 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
1324 hwtid));
1325 rpl->peer_ip = peer_ip;
1326 rpl->opt0h = htonl(F_TCAM_BYPASS);
1327 rpl->opt0l_status = htonl(CPL_PASS_OPEN_REJECT);
1328 rpl->opt2 = 0;
1329 rpl->rsvd = rpl->opt2;
1330 iwch_cxgb3_ofld_send(tdev, skb);
1331 }
1332}
1333
1334static int pass_accept_req(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1335{
1336 struct iwch_ep *child_ep, *parent_ep = ctx;
1337 struct cpl_pass_accept_req *req = cplhdr(skb);
1338 unsigned int hwtid = GET_TID(req);
1339 struct dst_entry *dst;
1340 struct l2t_entry *l2t;
1341 struct rtable *rt;
1342 struct iff_mac tim;
1343
1344 pr_debug("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid);
1345
1346 if (state_read(&parent_ep->com) != LISTEN) {
1347 pr_err("%s - listening ep not in LISTEN\n", __func__);
1348 goto reject;
1349 }
1350
1351
1352
1353
1354 tim.mac_addr = req->dst_mac;
1355 tim.vlan_tag = ntohs(req->vlan_tag);
1356 if (tdev->ctl(tdev, GET_IFF_FROM_MAC, &tim) < 0 || !tim.dev) {
1357 pr_err("%s bad dst mac %pM\n", __func__, req->dst_mac);
1358 goto reject;
1359 }
1360
1361
1362 rt = find_route(tdev,
1363 req->local_ip,
1364 req->peer_ip,
1365 req->local_port,
1366 req->peer_port, G_PASS_OPEN_TOS(ntohl(req->tos_tid)));
1367 if (!rt) {
1368 pr_err("%s - failed to find dst entry!\n", __func__);
1369 goto reject;
1370 }
1371 dst = &rt->dst;
1372 l2t = t3_l2t_get(tdev, dst, NULL, &req->peer_ip);
1373 if (!l2t) {
1374 pr_err("%s - failed to allocate l2t entry!\n", __func__);
1375 dst_release(dst);
1376 goto reject;
1377 }
1378 child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
1379 if (!child_ep) {
1380 pr_err("%s - failed to allocate ep entry!\n", __func__);
1381 l2t_release(tdev, l2t);
1382 dst_release(dst);
1383 goto reject;
1384 }
1385 state_set(&child_ep->com, CONNECTING);
1386 child_ep->com.tdev = tdev;
1387 child_ep->com.cm_id = NULL;
1388 child_ep->com.local_addr.sin_family = AF_INET;
1389 child_ep->com.local_addr.sin_port = req->local_port;
1390 child_ep->com.local_addr.sin_addr.s_addr = req->local_ip;
1391 child_ep->com.remote_addr.sin_family = AF_INET;
1392 child_ep->com.remote_addr.sin_port = req->peer_port;
1393 child_ep->com.remote_addr.sin_addr.s_addr = req->peer_ip;
1394 get_ep(&parent_ep->com);
1395 child_ep->parent_ep = parent_ep;
1396 child_ep->tos = G_PASS_OPEN_TOS(ntohl(req->tos_tid));
1397 child_ep->l2t = l2t;
1398 child_ep->dst = dst;
1399 child_ep->hwtid = hwtid;
1400 timer_setup(&child_ep->timer, ep_timeout, 0);
1401 cxgb3_insert_tid(tdev, &t3c_client, child_ep, hwtid);
1402 accept_cr(child_ep, req->peer_ip, skb);
1403 goto out;
1404reject:
1405 reject_cr(tdev, hwtid, req->peer_ip, skb);
1406out:
1407 return CPL_RET_BUF_DONE;
1408}
1409
1410static int pass_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1411{
1412 struct iwch_ep *ep = ctx;
1413 struct cpl_pass_establish *req = cplhdr(skb);
1414
1415 pr_debug("%s ep %p\n", __func__, ep);
1416 ep->snd_seq = ntohl(req->snd_isn);
1417 ep->rcv_seq = ntohl(req->rcv_isn);
1418
1419 set_emss(ep, ntohs(req->tcp_opt));
1420
1421 dst_confirm(ep->dst);
1422 state_set(&ep->com, MPA_REQ_WAIT);
1423 start_ep_timer(ep);
1424
1425 return CPL_RET_BUF_DONE;
1426}
1427
1428static int peer_close(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1429{
1430 struct iwch_ep *ep = ctx;
1431 struct iwch_qp_attributes attrs;
1432 unsigned long flags;
1433 int disconnect = 1;
1434 int release = 0;
1435
1436 pr_debug("%s ep %p\n", __func__, ep);
1437 dst_confirm(ep->dst);
1438
1439 spin_lock_irqsave(&ep->com.lock, flags);
1440 switch (ep->com.state) {
1441 case MPA_REQ_WAIT:
1442 __state_set(&ep->com, CLOSING);
1443 break;
1444 case MPA_REQ_SENT:
1445 __state_set(&ep->com, CLOSING);
1446 connect_reply_upcall(ep, -ECONNRESET);
1447 break;
1448 case MPA_REQ_RCVD:
1449
1450
1451
1452
1453
1454
1455
1456 __state_set(&ep->com, CLOSING);
1457 ep->com.rpl_done = 1;
1458 ep->com.rpl_err = -ECONNRESET;
1459 pr_debug("waking up ep %p\n", ep);
1460 wake_up(&ep->com.waitq);
1461 break;
1462 case MPA_REP_SENT:
1463 __state_set(&ep->com, CLOSING);
1464 ep->com.rpl_done = 1;
1465 ep->com.rpl_err = -ECONNRESET;
1466 pr_debug("waking up ep %p\n", ep);
1467 wake_up(&ep->com.waitq);
1468 break;
1469 case FPDU_MODE:
1470 start_ep_timer(ep);
1471 __state_set(&ep->com, CLOSING);
1472 attrs.next_state = IWCH_QP_STATE_CLOSING;
1473 iwch_modify_qp(ep->com.qp->rhp, ep->com.qp,
1474 IWCH_QP_ATTR_NEXT_STATE, &attrs, 1);
1475 peer_close_upcall(ep);
1476 break;
1477 case ABORTING:
1478 disconnect = 0;
1479 break;
1480 case CLOSING:
1481 __state_set(&ep->com, MORIBUND);
1482 disconnect = 0;
1483 break;
1484 case MORIBUND:
1485 stop_ep_timer(ep);
1486 if (ep->com.cm_id && ep->com.qp) {
1487 attrs.next_state = IWCH_QP_STATE_IDLE;
1488 iwch_modify_qp(ep->com.qp->rhp, ep->com.qp,
1489 IWCH_QP_ATTR_NEXT_STATE, &attrs, 1);
1490 }
1491 close_complete_upcall(ep);
1492 __state_set(&ep->com, DEAD);
1493 release = 1;
1494 disconnect = 0;
1495 break;
1496 case DEAD:
1497 disconnect = 0;
1498 break;
1499 default:
1500 BUG_ON(1);
1501 }
1502 spin_unlock_irqrestore(&ep->com.lock, flags);
1503 if (disconnect)
1504 iwch_ep_disconnect(ep, 0, GFP_KERNEL);
1505 if (release)
1506 release_ep_resources(ep);
1507 return CPL_RET_BUF_DONE;
1508}
1509
1510
1511
1512
1513static int is_neg_adv_abort(unsigned int status)
1514{
1515 return status == CPL_ERR_RTX_NEG_ADVICE ||
1516 status == CPL_ERR_PERSIST_NEG_ADVICE;
1517}
1518
1519static int peer_abort(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1520{
1521 struct cpl_abort_req_rss *req = cplhdr(skb);
1522 struct iwch_ep *ep = ctx;
1523 struct cpl_abort_rpl *rpl;
1524 struct sk_buff *rpl_skb;
1525 struct iwch_qp_attributes attrs;
1526 int ret;
1527 int release = 0;
1528 unsigned long flags;
1529
1530 if (is_neg_adv_abort(req->status)) {
1531 pr_debug("%s neg_adv_abort ep %p tid %d\n", __func__, ep,
1532 ep->hwtid);
1533 t3_l2t_send_event(ep->com.tdev, ep->l2t);
1534 return CPL_RET_BUF_DONE;
1535 }
1536
1537
1538
1539
1540
1541 if (!test_and_set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags)) {
1542 return CPL_RET_BUF_DONE;
1543 }
1544
1545 spin_lock_irqsave(&ep->com.lock, flags);
1546 pr_debug("%s ep %p state %u\n", __func__, ep, ep->com.state);
1547 switch (ep->com.state) {
1548 case CONNECTING:
1549 break;
1550 case MPA_REQ_WAIT:
1551 stop_ep_timer(ep);
1552 break;
1553 case MPA_REQ_SENT:
1554 stop_ep_timer(ep);
1555 connect_reply_upcall(ep, -ECONNRESET);
1556 break;
1557 case MPA_REP_SENT:
1558 ep->com.rpl_done = 1;
1559 ep->com.rpl_err = -ECONNRESET;
1560 pr_debug("waking up ep %p\n", ep);
1561 wake_up(&ep->com.waitq);
1562 break;
1563 case MPA_REQ_RCVD:
1564
1565
1566
1567
1568
1569
1570
1571 ep->com.rpl_done = 1;
1572 ep->com.rpl_err = -ECONNRESET;
1573 pr_debug("waking up ep %p\n", ep);
1574 wake_up(&ep->com.waitq);
1575 break;
1576 case MORIBUND:
1577 case CLOSING:
1578 stop_ep_timer(ep);
1579
1580 case FPDU_MODE:
1581 if (ep->com.cm_id && ep->com.qp) {
1582 attrs.next_state = IWCH_QP_STATE_ERROR;
1583 ret = iwch_modify_qp(ep->com.qp->rhp,
1584 ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
1585 &attrs, 1);
1586 if (ret)
1587 pr_err("%s - qp <- error failed!\n", __func__);
1588 }
1589 peer_abort_upcall(ep);
1590 break;
1591 case ABORTING:
1592 break;
1593 case DEAD:
1594 pr_debug("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
1595 spin_unlock_irqrestore(&ep->com.lock, flags);
1596 return CPL_RET_BUF_DONE;
1597 default:
1598 BUG_ON(1);
1599 break;
1600 }
1601 dst_confirm(ep->dst);
1602 if (ep->com.state != ABORTING) {
1603 __state_set(&ep->com, DEAD);
1604 release = 1;
1605 }
1606 spin_unlock_irqrestore(&ep->com.lock, flags);
1607
1608 rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
1609 if (!rpl_skb) {
1610 pr_err("%s - cannot allocate skb!\n", __func__);
1611 release = 1;
1612 goto out;
1613 }
1614 rpl_skb->priority = CPL_PRIORITY_DATA;
1615 rpl = skb_put(rpl_skb, sizeof(*rpl));
1616 rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
1617 rpl->wr.wr_lo = htonl(V_WR_TID(ep->hwtid));
1618 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
1619 rpl->cmd = CPL_ABORT_NO_RST;
1620 iwch_cxgb3_ofld_send(ep->com.tdev, rpl_skb);
1621out:
1622 if (release)
1623 release_ep_resources(ep);
1624 return CPL_RET_BUF_DONE;
1625}
1626
1627static int close_con_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1628{
1629 struct iwch_ep *ep = ctx;
1630 struct iwch_qp_attributes attrs;
1631 unsigned long flags;
1632 int release = 0;
1633
1634 pr_debug("%s ep %p\n", __func__, ep);
1635 BUG_ON(!ep);
1636
1637
1638 spin_lock_irqsave(&ep->com.lock, flags);
1639 switch (ep->com.state) {
1640 case CLOSING:
1641 __state_set(&ep->com, MORIBUND);
1642 break;
1643 case MORIBUND:
1644 stop_ep_timer(ep);
1645 if ((ep->com.cm_id) && (ep->com.qp)) {
1646 attrs.next_state = IWCH_QP_STATE_IDLE;
1647 iwch_modify_qp(ep->com.qp->rhp,
1648 ep->com.qp,
1649 IWCH_QP_ATTR_NEXT_STATE,
1650 &attrs, 1);
1651 }
1652 close_complete_upcall(ep);
1653 __state_set(&ep->com, DEAD);
1654 release = 1;
1655 break;
1656 case ABORTING:
1657 case DEAD:
1658 break;
1659 default:
1660 BUG_ON(1);
1661 break;
1662 }
1663 spin_unlock_irqrestore(&ep->com.lock, flags);
1664 if (release)
1665 release_ep_resources(ep);
1666 return CPL_RET_BUF_DONE;
1667}
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681static int terminate(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1682{
1683 struct iwch_ep *ep = ctx;
1684
1685 if (state_read(&ep->com) != FPDU_MODE)
1686 return CPL_RET_BUF_DONE;
1687
1688 pr_debug("%s ep %p\n", __func__, ep);
1689 skb_pull(skb, sizeof(struct cpl_rdma_terminate));
1690 pr_debug("%s saving %d bytes of term msg\n", __func__, skb->len);
1691 skb_copy_from_linear_data(skb, ep->com.qp->attr.terminate_buffer,
1692 skb->len);
1693 ep->com.qp->attr.terminate_msg_len = skb->len;
1694 ep->com.qp->attr.is_terminate_local = 0;
1695 return CPL_RET_BUF_DONE;
1696}
1697
1698static int ec_status(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
1699{
1700 struct cpl_rdma_ec_status *rep = cplhdr(skb);
1701 struct iwch_ep *ep = ctx;
1702
1703 pr_debug("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid,
1704 rep->status);
1705 if (rep->status) {
1706 struct iwch_qp_attributes attrs;
1707
1708 pr_err("%s BAD CLOSE - Aborting tid %u\n",
1709 __func__, ep->hwtid);
1710 stop_ep_timer(ep);
1711 attrs.next_state = IWCH_QP_STATE_ERROR;
1712 iwch_modify_qp(ep->com.qp->rhp,
1713 ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
1714 &attrs, 1);
1715 abort_connection(ep, NULL, GFP_KERNEL);
1716 }
1717 return CPL_RET_BUF_DONE;
1718}
1719
1720static void ep_timeout(struct timer_list *t)
1721{
1722 struct iwch_ep *ep = from_timer(ep, t, timer);
1723 struct iwch_qp_attributes attrs;
1724 unsigned long flags;
1725 int abort = 1;
1726
1727 spin_lock_irqsave(&ep->com.lock, flags);
1728 pr_debug("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
1729 ep->com.state);
1730 switch (ep->com.state) {
1731 case MPA_REQ_SENT:
1732 __state_set(&ep->com, ABORTING);
1733 connect_reply_upcall(ep, -ETIMEDOUT);
1734 break;
1735 case MPA_REQ_WAIT:
1736 __state_set(&ep->com, ABORTING);
1737 break;
1738 case CLOSING:
1739 case MORIBUND:
1740 if (ep->com.cm_id && ep->com.qp) {
1741 attrs.next_state = IWCH_QP_STATE_ERROR;
1742 iwch_modify_qp(ep->com.qp->rhp,
1743 ep->com.qp, IWCH_QP_ATTR_NEXT_STATE,
1744 &attrs, 1);
1745 }
1746 __state_set(&ep->com, ABORTING);
1747 break;
1748 default:
1749 WARN(1, "%s unexpected state ep %p state %u\n",
1750 __func__, ep, ep->com.state);
1751 abort = 0;
1752 }
1753 spin_unlock_irqrestore(&ep->com.lock, flags);
1754 if (abort)
1755 abort_connection(ep, NULL, GFP_ATOMIC);
1756 put_ep(&ep->com);
1757}
1758
1759int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
1760{
1761 struct iwch_ep *ep = to_ep(cm_id);
1762
1763 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1764
1765 if (state_read(&ep->com) == DEAD) {
1766 put_ep(&ep->com);
1767 return -ECONNRESET;
1768 }
1769 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1770 if (mpa_rev == 0)
1771 abort_connection(ep, NULL, GFP_KERNEL);
1772 else {
1773 send_mpa_reject(ep, pdata, pdata_len);
1774 iwch_ep_disconnect(ep, 0, GFP_KERNEL);
1775 }
1776 put_ep(&ep->com);
1777 return 0;
1778}
1779
1780int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1781{
1782 int err;
1783 struct iwch_qp_attributes attrs;
1784 enum iwch_qp_attr_mask mask;
1785 struct iwch_ep *ep = to_ep(cm_id);
1786 struct iwch_dev *h = to_iwch_dev(cm_id->device);
1787 struct iwch_qp *qp = get_qhp(h, conn_param->qpn);
1788
1789 pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
1790 if (state_read(&ep->com) == DEAD) {
1791 err = -ECONNRESET;
1792 goto err;
1793 }
1794
1795 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD);
1796 BUG_ON(!qp);
1797
1798 if ((conn_param->ord > qp->rhp->attr.max_rdma_read_qp_depth) ||
1799 (conn_param->ird > qp->rhp->attr.max_rdma_reads_per_qp)) {
1800 abort_connection(ep, NULL, GFP_KERNEL);
1801 err = -EINVAL;
1802 goto err;
1803 }
1804
1805 cm_id->add_ref(cm_id);
1806 ep->com.cm_id = cm_id;
1807 ep->com.qp = qp;
1808
1809 ep->ird = conn_param->ird;
1810 ep->ord = conn_param->ord;
1811
1812 if (peer2peer && ep->ird == 0)
1813 ep->ird = 1;
1814
1815 pr_debug("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
1816
1817
1818 attrs.mpa_attr = ep->mpa_attr;
1819 attrs.max_ird = ep->ird;
1820 attrs.max_ord = ep->ord;
1821 attrs.llp_stream_handle = ep;
1822 attrs.next_state = IWCH_QP_STATE_RTS;
1823
1824
1825 mask = IWCH_QP_ATTR_NEXT_STATE |
1826 IWCH_QP_ATTR_LLP_STREAM_HANDLE |
1827 IWCH_QP_ATTR_MPA_ATTR |
1828 IWCH_QP_ATTR_MAX_IRD |
1829 IWCH_QP_ATTR_MAX_ORD;
1830
1831 err = iwch_modify_qp(ep->com.qp->rhp,
1832 ep->com.qp, mask, &attrs, 1);
1833 if (err)
1834 goto err1;
1835
1836
1837 if (iwch_rqes_posted(qp)) {
1838 wait_event(ep->com.waitq, ep->com.rpl_done);
1839 err = ep->com.rpl_err;
1840 if (err)
1841 goto err1;
1842 }
1843
1844 err = send_mpa_reply(ep, conn_param->private_data,
1845 conn_param->private_data_len);
1846 if (err)
1847 goto err1;
1848
1849
1850 state_set(&ep->com, FPDU_MODE);
1851 established_upcall(ep);
1852 put_ep(&ep->com);
1853 return 0;
1854err1:
1855 ep->com.cm_id = NULL;
1856 ep->com.qp = NULL;
1857 cm_id->rem_ref(cm_id);
1858err:
1859 put_ep(&ep->com);
1860 return err;
1861}
1862
1863static int is_loopback_dst(struct iw_cm_id *cm_id)
1864{
1865 struct net_device *dev;
1866 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
1867
1868 dev = ip_dev_find(&init_net, raddr->sin_addr.s_addr);
1869 if (!dev)
1870 return 0;
1871 dev_put(dev);
1872 return 1;
1873}
1874
1875int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
1876{
1877 struct iwch_dev *h = to_iwch_dev(cm_id->device);
1878 struct iwch_ep *ep;
1879 struct rtable *rt;
1880 int err = 0;
1881 struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr;
1882 struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr;
1883
1884 if (cm_id->m_remote_addr.ss_family != PF_INET) {
1885 err = -ENOSYS;
1886 goto out;
1887 }
1888
1889 if (is_loopback_dst(cm_id)) {
1890 err = -ENOSYS;
1891 goto out;
1892 }
1893
1894 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
1895 if (!ep) {
1896 pr_err("%s - cannot alloc ep\n", __func__);
1897 err = -ENOMEM;
1898 goto out;
1899 }
1900 timer_setup(&ep->timer, ep_timeout, 0);
1901 ep->plen = conn_param->private_data_len;
1902 if (ep->plen)
1903 memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
1904 conn_param->private_data, ep->plen);
1905 ep->ird = conn_param->ird;
1906 ep->ord = conn_param->ord;
1907
1908 if (peer2peer && ep->ord == 0)
1909 ep->ord = 1;
1910
1911 ep->com.tdev = h->rdev.t3cdev_p;
1912
1913 cm_id->add_ref(cm_id);
1914 ep->com.cm_id = cm_id;
1915 ep->com.qp = get_qhp(h, conn_param->qpn);
1916 BUG_ON(!ep->com.qp);
1917 pr_debug("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
1918 ep->com.qp, cm_id);
1919
1920
1921
1922
1923 ep->atid = cxgb3_alloc_atid(h->rdev.t3cdev_p, &t3c_client, ep);
1924 if (ep->atid == -1) {
1925 pr_err("%s - cannot alloc atid\n", __func__);
1926 err = -ENOMEM;
1927 goto fail2;
1928 }
1929
1930
1931 rt = find_route(h->rdev.t3cdev_p, laddr->sin_addr.s_addr,
1932 raddr->sin_addr.s_addr, laddr->sin_port,
1933 raddr->sin_port, IPTOS_LOWDELAY);
1934 if (!rt) {
1935 pr_err("%s - cannot find route\n", __func__);
1936 err = -EHOSTUNREACH;
1937 goto fail3;
1938 }
1939 ep->dst = &rt->dst;
1940 ep->l2t = t3_l2t_get(ep->com.tdev, ep->dst, NULL,
1941 &raddr->sin_addr.s_addr);
1942 if (!ep->l2t) {
1943 pr_err("%s - cannot alloc l2e\n", __func__);
1944 err = -ENOMEM;
1945 goto fail4;
1946 }
1947
1948 state_set(&ep->com, CONNECTING);
1949 ep->tos = IPTOS_LOWDELAY;
1950 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
1951 sizeof(ep->com.local_addr));
1952 memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr,
1953 sizeof(ep->com.remote_addr));
1954
1955
1956 err = send_connect(ep);
1957 if (!err)
1958 goto out;
1959
1960 l2t_release(h->rdev.t3cdev_p, ep->l2t);
1961fail4:
1962 dst_release(ep->dst);
1963fail3:
1964 cxgb3_free_atid(ep->com.tdev, ep->atid);
1965fail2:
1966 cm_id->rem_ref(cm_id);
1967 put_ep(&ep->com);
1968out:
1969 return err;
1970}
1971
1972int iwch_create_listen(struct iw_cm_id *cm_id, int backlog)
1973{
1974 int err = 0;
1975 struct iwch_dev *h = to_iwch_dev(cm_id->device);
1976 struct iwch_listen_ep *ep;
1977
1978
1979 might_sleep();
1980
1981 if (cm_id->m_local_addr.ss_family != PF_INET) {
1982 err = -ENOSYS;
1983 goto fail1;
1984 }
1985
1986 ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
1987 if (!ep) {
1988 pr_err("%s - cannot alloc ep\n", __func__);
1989 err = -ENOMEM;
1990 goto fail1;
1991 }
1992 pr_debug("%s ep %p\n", __func__, ep);
1993 ep->com.tdev = h->rdev.t3cdev_p;
1994 cm_id->add_ref(cm_id);
1995 ep->com.cm_id = cm_id;
1996 ep->backlog = backlog;
1997 memcpy(&ep->com.local_addr, &cm_id->m_local_addr,
1998 sizeof(ep->com.local_addr));
1999
2000
2001
2002
2003 ep->stid = cxgb3_alloc_stid(h->rdev.t3cdev_p, &t3c_client, ep);
2004 if (ep->stid == -1) {
2005 pr_err("%s - cannot alloc atid\n", __func__);
2006 err = -ENOMEM;
2007 goto fail2;
2008 }
2009
2010 state_set(&ep->com, LISTEN);
2011 err = listen_start(ep);
2012 if (err)
2013 goto fail3;
2014
2015
2016 wait_event(ep->com.waitq, ep->com.rpl_done);
2017 err = ep->com.rpl_err;
2018 if (!err) {
2019 cm_id->provider_data = ep;
2020 goto out;
2021 }
2022fail3:
2023 cxgb3_free_stid(ep->com.tdev, ep->stid);
2024fail2:
2025 cm_id->rem_ref(cm_id);
2026 put_ep(&ep->com);
2027fail1:
2028out:
2029 return err;
2030}
2031
2032int iwch_destroy_listen(struct iw_cm_id *cm_id)
2033{
2034 int err;
2035 struct iwch_listen_ep *ep = to_listen_ep(cm_id);
2036
2037 pr_debug("%s ep %p\n", __func__, ep);
2038
2039 might_sleep();
2040 state_set(&ep->com, DEAD);
2041 ep->com.rpl_done = 0;
2042 ep->com.rpl_err = 0;
2043 err = listen_stop(ep);
2044 if (err)
2045 goto done;
2046 wait_event(ep->com.waitq, ep->com.rpl_done);
2047 cxgb3_free_stid(ep->com.tdev, ep->stid);
2048done:
2049 err = ep->com.rpl_err;
2050 cm_id->rem_ref(cm_id);
2051 put_ep(&ep->com);
2052 return err;
2053}
2054
2055int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp)
2056{
2057 int ret=0;
2058 unsigned long flags;
2059 int close = 0;
2060 int fatal = 0;
2061 struct t3cdev *tdev;
2062 struct cxio_rdev *rdev;
2063
2064 spin_lock_irqsave(&ep->com.lock, flags);
2065
2066 pr_debug("%s ep %p state %s, abrupt %d\n", __func__, ep,
2067 states[ep->com.state], abrupt);
2068
2069 tdev = (struct t3cdev *)ep->com.tdev;
2070 rdev = (struct cxio_rdev *)tdev->ulp;
2071 if (cxio_fatal_error(rdev)) {
2072 fatal = 1;
2073 close_complete_upcall(ep);
2074 ep->com.state = DEAD;
2075 }
2076 switch (ep->com.state) {
2077 case MPA_REQ_WAIT:
2078 case MPA_REQ_SENT:
2079 case MPA_REQ_RCVD:
2080 case MPA_REP_SENT:
2081 case FPDU_MODE:
2082 close = 1;
2083 if (abrupt)
2084 ep->com.state = ABORTING;
2085 else {
2086 ep->com.state = CLOSING;
2087 start_ep_timer(ep);
2088 }
2089 set_bit(CLOSE_SENT, &ep->com.flags);
2090 break;
2091 case CLOSING:
2092 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
2093 close = 1;
2094 if (abrupt) {
2095 stop_ep_timer(ep);
2096 ep->com.state = ABORTING;
2097 } else
2098 ep->com.state = MORIBUND;
2099 }
2100 break;
2101 case MORIBUND:
2102 case ABORTING:
2103 case DEAD:
2104 pr_debug("%s ignoring disconnect ep %p state %u\n",
2105 __func__, ep, ep->com.state);
2106 break;
2107 default:
2108 BUG();
2109 break;
2110 }
2111
2112 spin_unlock_irqrestore(&ep->com.lock, flags);
2113 if (close) {
2114 if (abrupt)
2115 ret = send_abort(ep, NULL, gfp);
2116 else
2117 ret = send_halfclose(ep, gfp);
2118 if (ret)
2119 fatal = 1;
2120 }
2121 if (fatal)
2122 release_ep_resources(ep);
2123 return ret;
2124}
2125
2126int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new,
2127 struct l2t_entry *l2t)
2128{
2129 struct iwch_ep *ep = ctx;
2130
2131 if (ep->dst != old)
2132 return 0;
2133
2134 pr_debug("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new,
2135 l2t);
2136 dst_hold(new);
2137 l2t_release(ep->com.tdev, ep->l2t);
2138 ep->l2t = l2t;
2139 dst_release(old);
2140 ep->dst = new;
2141 return 1;
2142}
2143
2144
2145
2146
2147
2148static const cxgb3_cpl_handler_func work_handlers[NUM_CPL_CMDS] = {
2149 [CPL_ACT_ESTABLISH] = act_establish,
2150 [CPL_ACT_OPEN_RPL] = act_open_rpl,
2151 [CPL_RX_DATA] = rx_data,
2152 [CPL_TX_DMA_ACK] = tx_ack,
2153 [CPL_ABORT_RPL_RSS] = abort_rpl,
2154 [CPL_ABORT_RPL] = abort_rpl,
2155 [CPL_PASS_OPEN_RPL] = pass_open_rpl,
2156 [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
2157 [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
2158 [CPL_PASS_ESTABLISH] = pass_establish,
2159 [CPL_PEER_CLOSE] = peer_close,
2160 [CPL_ABORT_REQ_RSS] = peer_abort,
2161 [CPL_CLOSE_CON_RPL] = close_con_rpl,
2162 [CPL_RDMA_TERMINATE] = terminate,
2163 [CPL_RDMA_EC_STATUS] = ec_status,
2164};
2165
2166static void process_work(struct work_struct *work)
2167{
2168 struct sk_buff *skb = NULL;
2169 void *ep;
2170 struct t3cdev *tdev;
2171 int ret;
2172
2173 while ((skb = skb_dequeue(&rxq))) {
2174 ep = *((void **) (skb->cb));
2175 tdev = *((struct t3cdev **) (skb->cb + sizeof(void *)));
2176 ret = work_handlers[G_OPCODE(ntohl((__force __be32)skb->csum))](tdev, skb, ep);
2177 if (ret & CPL_RET_BUF_DONE)
2178 kfree_skb(skb);
2179
2180
2181
2182
2183 put_ep((struct iwch_ep_common *)ep);
2184 }
2185}
2186
2187static DECLARE_WORK(skb_work, process_work);
2188
2189static int sched(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
2190{
2191 struct iwch_ep_common *epc = ctx;
2192
2193 get_ep(epc);
2194
2195
2196
2197
2198 *((void **) skb->cb) = ctx;
2199 *((struct t3cdev **) (skb->cb + sizeof(void *))) = tdev;
2200
2201
2202
2203
2204 skb_queue_tail(&rxq, skb);
2205 queue_work(workq, &skb_work);
2206 return 0;
2207}
2208
2209static int set_tcb_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
2210{
2211 struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
2212
2213 if (rpl->status != CPL_ERR_NONE) {
2214 pr_err("Unexpected SET_TCB_RPL status %u for tid %u\n",
2215 rpl->status, GET_TID(rpl));
2216 }
2217 return CPL_RET_BUF_DONE;
2218}
2219
2220
2221
2222
2223
2224cxgb3_cpl_handler_func t3c_handlers[NUM_CPL_CMDS] = {
2225 [CPL_ACT_ESTABLISH] = sched,
2226 [CPL_ACT_OPEN_RPL] = sched,
2227 [CPL_RX_DATA] = sched,
2228 [CPL_TX_DMA_ACK] = sched,
2229 [CPL_ABORT_RPL_RSS] = sched,
2230 [CPL_ABORT_RPL] = sched,
2231 [CPL_PASS_OPEN_RPL] = sched,
2232 [CPL_CLOSE_LISTSRV_RPL] = sched,
2233 [CPL_PASS_ACCEPT_REQ] = sched,
2234 [CPL_PASS_ESTABLISH] = sched,
2235 [CPL_PEER_CLOSE] = sched,
2236 [CPL_CLOSE_CON_RPL] = sched,
2237 [CPL_ABORT_REQ_RSS] = sched,
2238 [CPL_RDMA_TERMINATE] = sched,
2239 [CPL_RDMA_EC_STATUS] = sched,
2240 [CPL_SET_TCB_RPL] = set_tcb_rpl,
2241};
2242
2243int __init iwch_cm_init(void)
2244{
2245 skb_queue_head_init(&rxq);
2246
2247 workq = alloc_ordered_workqueue("iw_cxgb3", WQ_MEM_RECLAIM);
2248 if (!workq)
2249 return -ENOMEM;
2250
2251 return 0;
2252}
2253
2254void __exit iwch_cm_term(void)
2255{
2256 flush_workqueue(workq);
2257 destroy_workqueue(workq);
2258}
2259
